Special Issue "X-Ray Free-Electron Laser"
Deadline for manuscript submissions: closed (31 March 2017)
Prof. Dr. Kiyoshi Ueda
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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Interests: electron dynamics; molecular dynamics; atoms, molecules and clusters; ultrafast phenomena; photoionization; molecular imaging; electron spectroscopy; many particle spectroscopy; coherent control; free electron lasers
During the last decade, the advent of the x-ray free electron lasers (XFELs) has opened a new research avenue for investigations of ultrafast electron and structure dynamics in any form of matter. XFELs deliver coherent x-ray pulses, combining unprecedented power densities up to 1020 W/cm2 and extremely short pulse durations down to a few femtoseconds, offering important advantages over conventional x-ray sources for many applications. Time-resolved spectroscopic and structure studies on the timescale of femtoseconds allow us to probe electrons and atoms in action. Indeed, XFELs have been applied to study ultrafast charge transfer in a molecule and a molecular complex, chemical bond breaking and formation, and phase transitions in solids. The intense coherent XFEL pulse focused down to 1 mm2 makes single-shot diffraction imaging of non-crystalized biomolecules and nano-size objects reality. On the other hand, since the XFEL pulses are entering a new regime of x-ray intensities, they are opening a new research field of studying interaction between intense x-ray pulses and various forms of matters. The extremely intense x-ray pulse strips off so many electrons from an isolated atom, leads to a violent Coulomb explosion of an isolated molecule, and transforms a solid target into extremely dense plasma. Furthermore, rapidly developing XFEL technologies make, not only fully coherent x-ray pulses available routinely, but also pulse shaping and phase-controlling of multicolor pulses reality, opening another novel research area of x-ray non-linear spectroscopy and attosecond coherent control.
The Special Issue of the journal Applied Sciences, “X-ray free electron lasers”, aims to cover recent advances in the development of XFELs and in the applications of XFELs in the field of physics, chemistry, and biology, as well as relevant theoretical studies in the fields.
Prof. Dr. Kiyoshi Ueda
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